Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Operating activities:
Net earnings (loss)	$ 618,738	$ (2,455)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization	22,211	24,177
Impairment of long-lived assets	9,924	40,601
Provision for (benefit from) deferred income taxes	71,031	(3,498)
Bad debt expense	94	168
Equity in net income of unconsolidated affiliates, net of distributions	(6,757)	5,082
Net loss on sale of assets	402	618
Stock-based compensation	4,856	3,995
Gains on investment in Nikola	(796,141)	0
Charitable contribution of Nikola shares	20,653
Loss on extinguishment of debt	0	4,034
Changes in assets and liabilities:
Receivables	(82,194)	14,981
Inventories	85,622	44,282
Accounts payable	47,154	(37,234)
Accrued compensation and employee benefits	23,852	(23,215)
Income taxes payable	83,664	10,556
Other operating items, net	14,279	(17,723)
Net cash provided by operating activities	117,388	64,369
Investing activities:
Investment in property, plant and equipment	(32,871)	(22,174)
Proceeds from sale of Nikola shares	487,859
Proceeds from sale of assets		9,176
Net cash provided (used) by investing activities	454,988	(12,998)
Financing activities:
Proceeds from long-term debt, net of issuance costs		101,598
Principal payments on long-term obligations and debt redemption costs	(97)	(153,977)
Payments for issuance of common shares, net of tax withholdings	(1,150)	(3,213)
Payments to noncontrolling interests	(560)
Repurchase of common shares	(54,320)	(29,599)
Dividends paid	(13,379)	(12,960)
Net cash used by financing activities	(69,506)	(98,151)
Increase (decrease) in cash and cash equivalents	502,870	(46,780)
Cash and cash equivalents at beginning of period	147,198	92,363
Cash and cash equivalents at end of period	$ 650,068	$ 45,583